Valve structure for internal combustion engines



April 26, R, R NG 1,855,634

VALVE STRUCTURE FOR INTERNAL COMBUSTION ENGINES Filed Sept. 25, 1928 561 Hot M ro Patented Apr. 26, 1932 ROLLIN R. INGALLS, or NOBBECK, sourn.DAKOTA VALVE srnuorunn "FOR inrnnnanlooiunusrion ENGINES, I

Application filed. September 25, 1928. Seiial No. 308,255. a

The present invention is directed to improvements in valve structuresfor internal combustion engines.

The primary object of the invention is to provide a device of thischaracter so constructed that the valve will unseat with comparativeease against pressure of the exhaust gases, and under little power fromthe valve actuating cams.

1 Another object of the invention is to provide a device of this kindhaving all of the advantages of an overhead valve mechanism without thecomplications of rocker arms and push rods.

Another object of the invention is to provide a structure of this naturewhich is so constructed that the resistance of the exhaust gases againstthe valve will be practically eliminated, thereby permitting the valveto actuate against comparatively little pressure.

With these and other objects in view, this invention resides in thenovel features of construction, formation, combination and arrangementof parts to be hereinafter more fully described, claimed and illustratedin the accompanying drawings, in which Figure 1 is a Vertical sectionalview through a part of the engine.

Figure 2 is a sectional view on line 2-2 of Figure 1.

Referring to the drawings, 1 designates a cylinder in which isreciprocable the piston 2, said cylinder having a removable head 3,

equipped with the usual spark plugs 4. The

head 3 is provided with a valve seat 5 which communicates with the pipe6, which serves as an inlet or exhaust according to which type of valveit is associated with. 7

It will be of course understood that each cylinder is provided with twovalves and two seats for controlling the inlet and exhaust.

The head 3 and cylinder 1 are provided with the conventional waterjacketsS 7, respectively.

Formed in the cylinder block and in direct alignment with the seat 5 isa cylindrical valve casing 9 in which is movable the hollow valve 10,which is closed by a head 11 having a rim 12 upon its upper end whichcooperates with the seat 5 to control the exhaust or inlet.

The valve 10 isprovided' upon its lower end with a socket 13 in which isswiveled the head 14 carried upon the upper end of the valve stem 15,said stem passing through the guide openings 16 formed in thebracket-.17 supported by the cylinder block. By swiveling the valve tothe stem itwill be obvious that the valve can rotate duringitsreciprocation I g T A. coil spring 18encircles the stem and isinterposed between the valve 10 and bracket 17, said spring serving tourge thevalve toits seat. 1

The lower end of the'stem 15 is adjustably threaded into theupper bar 19of theframe 20, said frame including sidebars 21 and a bottom bar 22,the side-barshaving 'longi tudinal grooves 23 formedftherein, thepurpose of which; will be later explained.

The crank case 24 is provided with a 'chamber 25, the side walls 26 26thereof having diametrically opposed vertical ribs ZR-2T I carriedthereby, which slidably engage the grooves 23 of the frame 20 in orderthat said frame will be effectively guided during its travel. 7 r

The camshaft 2 8 is controlled by the crank shaft of theengine ascustomary, and has fixed thereto cams 29 which are confined within theframe 20.

It will beobserved that the cams 29 engage the bar 22 of the frame onlyduring rotation thereof, which unseats the valve at proper intervals toadmit a charge of fuel or permit the exhaust of the products ofcombustion from the combustion chamber. The spring 15 will obviouslyurge the valves to their seats after each revolution of the cam.

The rims 12 are comparatively narrow, therefore the exhaust gasespassing through the seats have a slight pressure upon the rims thuspermitting the valve to unseat with ease, and with very littlepower'from the cams.

It will be observed that the combustion .95 chambers have directcommunication with the seats5 through a single straight passage 30, andsince the valves are so constructed as to eliminate the use ofcomparatively largeheads and narrow. stems the collection of 1 carbonupon the valve is practically eliminated.

The cylinder block carries bolts 31 which serve to retain the coverplate 32 in place, 5 access being had to the stems for adjusting the jamnuts 33 to compensate for wear and make minor adjustments upon removalof the cover plate.

From the foregoing, it is thought that the 10 construction, operationand many advantages of the herein described invention will be apparentto those skilled in the art, without further description, and it will beunderstood that various changes in the size, shape, and

16 proportion and minor details of construction, may be resorted towithout departing from the spirit or sacrificing any of the advantagesof the invention.

What is claimed is:

20 In an internal combustion engine, a hollow cylindrical valve closedat both ends and having a central valve stem opening in one end, acylindrical valve casing for the valve integral with the engine wall,the valve having a bevelled outstanding rim at the top, a beveled valveseat in the engine structure to receive said rim, a valve stem looselymounted in said opening upon which said cylindrical valve may swivel, anintegral disk head on 80 said stem rotatably and snugly received in thebore of the cylindrical valve to prevent wobbling of the stem,a helicalspring surrounding said stem. and bearing at one end upon saidcylindrical valve for yieldably 36 holding the valve closed, a bracketextending outwardly from the engine wall and performing the dualfunction of a support for the other end of said spring and a guide forsaid valve stem, and means for actuating said 40 valve stem to open thevalve against the tension of said spring.

' In testimony whereof I aifix In signature.

ROLLIN R. 'INGALL [1,. 8.]

